摘要
针对非常规油气藏开发中存在的强水敏性,水平井在长段泥岩中钻进时存在的井壁稳定性差、摩阻大、携岩差以及储层污染等问题,通过室内试验优选出梳型弧状结构乳化剂,优化有机土和降滤失剂加量,形成抗温达180℃、密度为2.1 g/cm^3的油基钻井液配方,并对其综合性能进行评价。该钻井液配方在沙特KHRS区块和塔河油田应用后,解决了非常规油气井井壁稳定性差、携岩差以及润滑防卡等问题,减少了井下事故的发生,提高了机械钻速。现场维护处理简单,能满足安全快速钻井施工的需要。
To solve the problems of strong water sensitivity interval,long period of mudstone section of borehole wall stability,large friction,poor rock carrying and reservoir pollution in unconventional reservoirs＇ development,an oil-base drilling fluid formulation was developed through laboratory test. The comb type arc structure emulsifier,organic soil and filtrate reducer was optimized and its resistance to temperature is 180 ℃ with density of 2. 1 g/cm3.The comprehensive performance of the formula was evaluated and applied successfully in KHRS region of Saudi Arabia and Tahe oilfield. Some problems were solved such as stable borehole,rock carrying and lubrication anti jamming of a drilling tool in unconventional reservoirs. Downhole accidents were reduced drastically and the rate of penetration was improved. The on-site maintenance process is simple and could meet the need of drilling safely and quickly.
出处
《重庆科技学院学报（自然科学版）》
CAS
2016年第3期50-53,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
"十二五"国家重大专项"大型油气田和煤层气开发"(2011ZX05045-03-03)
关键词
油基钻井液
非常规油气藏
水敏性地层
井壁稳定
防塌钻井液
oil-base drilling fluid
unconventional reservoir
water sensitivity formation
stable borehole
anti-sloughing drilling fluid
